To edit and open files that require administrator privileges on Ubuntu Linux, you can use the sudo command to run a text editor with elevated privileges. The most commonly used text editors on Ubuntu are nano and vi.
For example, to edit the /etc/sudoers file using nano, run the following command:
sudo nano /etc/sudoers
And for vi:
sudo vi /etc/sudoers
This will open the file in the text editor with administrative privileges, allowing you to make changes to the file and save them.
Note: Be careful when editing system files, as a mistake can render your system unusable. It’s a good idea to back up the original file before making changes.